// SPDX-License-Identifier: GPL-2.0
/*
* Driver for the ST STV6111 tuner
*
* Copyright (C) 2014 Digital Devices GmbH
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/init.h>
#include <linux/delay.h>
#include <linux/firmware.h>
#include <linux/i2c.h>
#include <asm/div64.h>
#include "stv6111.h"
#include <media/dvb_frontend.h>
struct stv {
struct i2c_adapter *i2c;
u8 adr;
u8 reg[11];
u32 ref_freq;
u32 frequency;
};
struct slookup {
s16 value;
u16 reg_value;
};
static const struct slookup lnagain_nf_lookup[] = {
/* Gain *100dB // Reg */
{ 2572, 0 },
{ 2575, 1 },
{ 2580, 2 },
{ 2588, 3 },
{ 2596, 4 },
{ 2611, 5 },
{ 2633, 6 },
{ 2664, 7 },
{ 2701, 8 },
{ 2753, 9 },
{ 2816, 10 },
{ 2902, 11 },
{ 2995, 12 },
{ 3104, 13 },
{ 3215, 14 },
{ 3337, 15 },
{ 3492, 16 },
{ 3614, 17 },
{ 3731, 18 },
{ 3861, 19 },
{ 3988, 20 },
{ 4124, 21 },
{ 4253, 22 },
{ 4386, 23 },
{ 4505, 24 },
{ 4623, 25 },
{ 4726, 26 },
{ 4821, 27 },
{ 4903, 28 },
{ 4979, 29 },
{ 5045, 30 },
{ 5102, 31 }
};
static const struct slookup lnagain_iip3_lookup[] = {
/* Gain *100dB // reg */
{ 1548, 0 },
{ 1552, 1 },
{ 1569, 2 },
{ 1565, 3 },
{ 1577, 4 },
{ 1594, 5 },
{ 1627, 6 },
{ 1656, 7 },
{ 1700, 8 },
{ 1748, 9 },
{ 1805, 10 },
{ 1896, 11 },
{ 1995, 12 },
{ 2113, 13 },
{ 2233, 14 },
{ 2366, 15 },
{ 2543, 16 },
{ 2687, 17 },
{ 2842, 18 },
{ 2999, 19 },
{ 3167, 20 },
{ 3342, 21 },
{ 3507, 22 },
{ 3679, 23 },
{ 3827, 24 },
{ 3970, 25 },
{ 4094, 26 },
{ 4210, 27 },
{ 4308, 28 },
{ 4396, 29 },
{ 4468, 30 },
{ 4535, 31 }
};
static const struct slookup gain_rfagc_lookup[] = {
/* Gain *100dB // reg */
{ 4870, 0x3000 },
{ 4850, 0x3C00 },
{ 4800, 0x4500 },
{ 4750, 0x4800 },
{ 4700, 0x4B00 },
{ 4650, 0x4D00 },
{ 4600, 0x4F00 },
{ 4550, 0x5100 },
{ 4500, 0x5200 },
{ 4420, 0x5500 },
{ 4316, 0x5800 },
{ 4200, 0x5B00 },
{ 4119, 0x5D00 },
{ 3999, 0x6000 },
{ 3950, 0x6100 },
{ 3876, 0x6300 },
{ 3755, 0x6600 },
{ 3641, 0x6900 },
{ 3567, 0x6B00 },
{ 3425, 0x6F00 },
{ 3350, 0x7100 },
{ 3236, 0x7400 },
{ 3118, 0x7700 },
{ 3004, 0x7A00 },
{ 2917, 0x7C00 },
{ 2776, 0x7F00 },
{ 2635, 0x8200 },
{ 2516, 0x8500 },
{ 2406, 0x8800 },
{ 2290, 0x8B00 },
{ 2170, 0x8E00 },
{ 2073, 0x9100 },
{ 1949, 0x9400 },
{ 1836, 0x9700 },
{ 1712, 0x9A00 },
{ 1631, 0x9C00 },
{ 1515, 0x9F00 },
{ 1400, 0xA200 },
{ 1323, 0xA400 },
{ 1203, 0xA700 },
{ 1091, 0xAA00 },
{ 1011, 0xAC00 },
{ 904, 0xAF00 },
{ 787, 0xB200 },
{ 685, 0xB500 },
{ 571, 0xB800 },
{ 464, 0xBB00 },
{ 374, 0xBE00 },
{ 275, 0xC200 },
{ 181, 0xC600 },
{ 102, 0xCC00 },
{ 49, 0xD900 }
};
/*
* This table is 6 dB too low comapred to the others (probably created with
* a different BB_MAG setting)
*/
static const struct slookup gain_channel_agc_nf_lookup[] = {
/* Gain *100dB // reg */
{ 7082, 0x3000 },
{ 7052, 0x4000 },
{ 7007, 0x4600 },
{ 6954, 0x4A00 },
{ 6909, 0x4D00 },
{ 6833, 0x5100 },
{ 6753, 0x5400 },
{ 6659, 0x5700 },
{ 6561, 0x5A00 },
{ 6472, 0x5C00 },
{ 6366, 0x5F00 },
{ 6259, 0x6100 },
{ 6151, 0x6400 },
{ 6026, 0x6700 },
{ 5920, 0x6900 },
{ 5835, 0x6B00 },
{ 5770, 0x6C00 },
{ 5681, 0x6E00 },
{ 5596, 0x7000 },
{ 5503, 0x7200 },
{ 5429, 0x7300 },
{ 5319, 0x7500 },
{ 5220, 0x7700 },
{ 5111, 0x7900 },
{ 4983, 0x7B00 },
{ 4876, 0x7D00 },
{ 4755, 0x7F00 },
{ 4635, 0x8100 },
{ 4499, 0x8300 },
{ 4405, 0x8500 },
{ 4323, 0x8600 },
{ 4233, 0x8800 },
{ 4156, 0x8A00 },
{ 4038, 0x8C00 },
{ 3935, 0x8E00 },
{ 3823, 0x9000 },
{ 3712, 0x9200 },
{ 3601, 0x9500 },
{ 3511, 0x9700 },
{ 3413, 0x9900 },
{ 3309, 0x9B00 },
{ 3213, 0x9D00 },
{ 3088, 0x9F00 },
{ 2992, 0xA100 },
{ 2878, 0xA400 },
{ 2769, 0xA700 },
{ 2645, 0xAA00 },
{ 2538, 0xAD00 },
{ 2441, 0xB000 },
{ 2350, 0xB600 },
{ 2237, 0xBA00 },
{ 2137, 0xBF00 },
{ 2039, 0xC500 },
{ 1938, 0xDF00 },
{ 1927, 0xFF00 }
};
static const struct slookup gain_channel_agc_iip3_lookup[] = {
/* Gain *100dB // reg */
{ 7070, 0x3000 },
{ 7028, 0x4000 },
{ 7019, 0x4600 },
{ 6900, 0x4A00 },
{ 6811, 0x4D00 },
{ 6763, 0x5100 },
{ 6690, 0x5400 },
{ 6644, 0x5700 },
{ 6617, 0x5A00 },
{ 6598, 0x5C00 },
{ 6462, 0x5F00 },
{ 6348, 0x6100 },
{ 6197, 0x6400 },
{ 6154, 0x6700 },
{ 6098, 0x6900 },
{ 5893, 0x6B00 },
{ 5812, 0x6C00 },
{ 5773, 0x6E00 },
{ 5723, 0x7000 },
{ 5661, 0x7200 },
{ 5579, 0x7300 },
{ 5460, 0x7500 },
{ 5308, 0x7700 },
{ 5099, 0x7900 },
{ 4910, 0x7B00 },
{ 4800, 0x7D00 },
{ 4785, 0x7F00 },
{ 4635, 0x8100 },
{ 4466, 0x8300 },
{ 4314, 0x8500 },
{ 4295, 0x8600 },
{ 4144, 0x8800 },
{ 3920, 0x8A00 },
{ 3889, 0x8C00 },
{ 3771, 0x8E00 },
{ 3655, 0x9000 },
{ 3446, 0x9200 },
{ 3298, 0x9500 },
{ 3083, 0x9700 },
{ 3015, 0x9900 },
{ 2833, 0x9B00 },
{ 2746, 0x9D00 },
{ 2632, 0x9F00 },
{ 2598, 0xA100 },
{ 2480, 0xA400 },
{ 2236, 0xA700 },
{ 2171, 0xAA00 },
{ 2060, 0xAD00 },
{ 1999, 0xB000 },
{ 1974, 0xB600 },
{ 1820, 0xBA00 },
{ 1741, 0xBF00 },
{ 1655, 0xC500 },
{ 1444, 0xDF00 },
{ 1325, 0xFF00 },
};
static inline u32 muldiv32(u32 a, u32 b, u32 c)
{
u64 tmp64;
tmp64 = (u64)a * (u64)b;
do_div(tmp64, c);
return (u32)tmp64;
}
static int i2c_read(struct i2c_adapter *adap,
u8 adr, u8 *msg, int len, u8 *answ, int alen)
{
struct i2c_msg msgs[2] = { { .addr = adr, .flags = 0,
.buf = msg, .len = len},
{ .addr = adr, .flags = I2C_M_RD,
.buf = answ, .len = alen } };
if (i2c_transfer(adap, msgs, 2) != 2) {
dev_err(&adap->dev, "i2c read error\n");
return -EIO;
}
return 0;
}
static int i2c_write(struct i2c_adapter *adap, u8 adr, u8 *data, int len)
{
struct i2c_msg msg = {.addr = adr, .flags = 0,
.buf = data, .len = len};
if (i2c_transfer(adap, &msg, 1) != 1) {
dev_err(&adap->dev, "i2c write error\n");
return -EIO;
}
return 0;
}
static int write_regs(struct stv *state, int reg, int len)
{
u8 d[12];
memcpy(&d[1], &state->reg[reg], len);
d[0] = reg;
return i2c_write(state->i2c, state->adr, d, len + 1);
}
static int write_reg(struct stv *state, u8 reg, u8 val)
{
u8 d[2] = {reg, val};
return i2c_write(state->i2c, state->adr, d, 2);
}
static int read_reg(struct stv *state, u8 reg, u8 *val)
{
return i2c_read(state->i2c, state->adr, ®, 1, val, 1);
}
static int wait_for_call_done(struct stv *state, u8 mask)
{
int status = 0;
u32 lock_retry_count = 10;
while (lock_retry_count > 0) {
u8 regval;
status = read_reg(state, 9, ®val);
if (status < 0)
return status;
if ((regval & mask) == 0)
break;
usleep_range(4000, 6000);
lock_retry_count -= 1;
status = -EIO;
}
return status;
}
static void init_state(struct stv *state)
{
u32 clkdiv = 0;
u32 agcmode = 0;
u32 agcref = 2;
u32 agcset = 0xffffffff;
u32 bbmode = 0xffffffff;
state->reg[0] = 0x08;
state->reg[1] = 0x41;
state->reg[2] = 0x8f;
state->reg[3] = 0x00;
state->reg[4] = 0xce;
state->reg[5] = 0x54;
state->reg[6] = 0x55;
state->reg[7] = 0x45;
state->reg[8] = 0x46;
state->reg[9] = 0xbd;
state->reg[10] = 0x11;
state->ref_freq = 16000;
if (clkdiv <= 3)
state->reg[0x00] |= (clkdiv & 0x03);
if (agcmode <= 3) {
state->reg[0x03] |= (agcmode << 5);
if (agcmode == 0x01)
state->reg[0x01] |= 0x30;
}
if (bbmode <= 3)
state->reg[0x01] = (state->reg[0x01] & ~0x30) | (bbmode << 4);
if (agcref <= 7)
state->reg[0x03] |= agcref;
if (agcset <= 31)
state->reg[0x02] = (state->reg[0x02] & ~0x1F) | agcset | 0x40;
}
static int attach_init(struct stv *state)
{
if (write_regs(state, 0, 11))
return -ENODEV;
return 0;
}
static void release(struct dvb_frontend *fe)
{
kfree(fe->tuner_priv);
fe->tuner_priv = NULL;
}
static int set_bandwidth(struct dvb_frontend *fe, u32 cutoff_frequency)
{
struct stv *state = fe->tuner_priv;
u32 index = (cutoff_frequency + 999999) / 1000000;
int stat = 0;
if (index < 6)
index = 6;
if (index > 50)
index = 50;
if ((state->reg[0x08] & ~0xFC) == ((index - 6) << 2))
return 0;
state->reg[0x08] = (state->reg[0x08] & ~0xFC) | ((index - 6) << 2);
state->reg[0x09] = (state->reg[0x09] & ~0x0C) | 0x08;
if (fe->ops.i2c_gate_ctrl)
stat = fe->ops.i2c_gate_ctrl(fe, 1);
if (!stat) {
write_regs(state, 0x08, 2);
wait_for_call_done(state, 0x08);
}
if (fe->ops.i2c_gate_ctrl && !stat)
fe->ops.i2c_gate_ctrl(fe, 0);
return stat;
}
static int set_lof(struct stv *state, u32 local_frequency, u32 cutoff_frequency)
{
u32 index = (cutoff_frequency + 999999) / 1000000;
u32 frequency = (local_frequency + 500) / 1000;
u32 p = 1, psel = 0, fvco, div, frac;
u8 icp, tmp;
if (index < 6)
index = 6;
if (index > 50)
index = 50;
if (frequency <= 1300000) {
p = 4;
psel = 1;
} else {
p = 2;
psel = 0;
}
fvco = frequency * p;
div = fvco / state->ref_freq;
frac = fvco % state->ref_freq;
frac = muldiv32(frac, 0x40000, state->ref_freq);
icp = 0;
if (fvco < 2700000)
icp = 0;
else if (fvco < 2950000)
icp = 1;
else if (fvco < 3300000)
icp = 2;
else if (fvco < 3700000)
icp = 3;
else if (fvco < 4200000)
icp = 5;
else if (fvco < 4800000)
icp = 6;
else
icp = 7;
state->reg[0x02] |= 0x80; /* LNA IIP3 Mode */
state->reg[0x03] = (state->reg[0x03] & ~0x80) | (psel << 7);
state->reg[0x04] = (div & 0xFF);
state->reg[0x05] = (((div >> 8) & 0x01) | ((frac & 0x7F) << 1)) & 0xff;
state->reg[0x06] = ((frac >> 7) & 0xFF);
state->reg[0x07] = (state->reg[0x07] & ~0x07) | ((frac >> 15) & 0x07);
state->reg[0x07] = (state->reg[0x07] & ~0xE0) | (icp << 5);
state->reg[0x08] = (state->reg[0x08] & ~0xFC) | ((index - 6) << 2);
/* Start cal vco,CF */
state->reg[0x09] = (state->reg[0x09] & ~0x0C) | 0x0C;
write_regs(state, 2, 8);
wait_for_call_done(state, 0x0C);
usleep_range(10000, 12000);
read_reg(state, 0x03, &tmp);
if (tmp & 0x10) {
state->reg[0x02] &= ~0x80; /* LNA NF Mode */
write_regs(state, 2, 1);
}
read_reg(state, 0x08, &tmp);
state->frequency = frequency;
return 0;
}
static int set_params(struct dvb_frontend *fe)
{
struct stv *state = fe->tuner_priv;
struct dtv_frontend_properties *p = &fe->dtv_property_cache;
u32 freq, cutoff;
int stat = 0;
if (p->delivery_system != SYS_DVBS && p->delivery_system != SYS_DVBS2)
return -EINVAL;
freq = p->frequency * 1000;
cutoff = 5000000 + muldiv32(p->symbol_rate, 135, 200);
if (fe->ops.i2c_gate_ctrl)
stat = fe->ops.i2c_gate_ctrl(fe, 1);
if (!stat)
set_lof(state, freq, cutoff);
if (fe->ops.i2c_gate_ctrl && !stat)
fe->ops.i2c_gate_ctrl(fe, 0);
return 0;
}
static s32 table_lookup(const struct slookup *table,
int table_size, u16 reg_value)
{
s32 gain;
s32 reg_diff;
int imin = 0;
int imax = table_size - 1;
int i;
/* Assumes Table[0].RegValue < Table[imax].RegValue */
if (reg_value <= table[0].reg_value) {
gain = table[0].value;
} else if (reg_value >= table[imax].reg_value) {
gain = table[imax].value;
} else {
while ((imax - imin) > 1) {
i = (imax + imin) / 2;
if ((table[imin].reg_value <= reg_value) &&
(reg_value <= table[i].reg_value))
imax = i;
else
imin = i;
}
reg_diff = table[imax].reg_value - table[imin].reg_value;
gain = table[imin].value;
if (reg_diff != 0)
gain += ((s32)(reg_value - table[imin].reg_value) *
(s32)(table[imax].value
- table[imin].value)) / reg_diff;
}
return gain;
}
static int get_rf_strength(struct dvb_frontend *fe, u16 *st)
{
struct stv *state = fe->tuner_priv;
u16 rfagc = *st;
s32 gain;
if ((state->reg[0x03] & 0x60) == 0) {
/* RF Mode, Read AGC ADC */
u8 reg = 0;
int stat = 0;
if (fe->ops.i2c_gate_ctrl)
stat = fe->ops.i2c_gate_ctrl(fe, 1);
if (!stat) {
write_reg(state, 0x02, state->reg[0x02] | 0x20);
read_reg(state, 2, ®);
if (reg & 0x20)
read_reg(state, 2, ®);
}
if (fe->ops.i2c_gate_ctrl && !stat)
fe->ops.i2c_gate_ctrl(fe, 0);
if ((state->reg[0x02] & 0x80) == 0)
/* NF */
gain = table_lookup(lnagain_nf_lookup,
ARRAY_SIZE(lnagain_nf_lookup),
reg & 0x1F);
else
/* IIP3 */
gain = table_lookup(lnagain_iip3_lookup,
ARRAY_SIZE(lnagain_iip3_lookup),
reg & 0x1F);
gain += table_lookup(gain_rfagc_lookup,
ARRAY_SIZE(gain_rfagc_lookup), rfagc);
gain -= 2400;
} else {
/* Channel Mode */
if ((state->reg[0x02] & 0x80) == 0) {
/* NF */
gain = table_lookup(
gain_channel_agc_nf_lookup,
ARRAY_SIZE(gain_channel_agc_nf_lookup), rfagc);
gain += 600;
} else {
/* IIP3 */
gain = table_lookup(
gain_channel_agc_iip3_lookup,
ARRAY_SIZE(gain_channel_agc_iip3_lookup),
rfagc);
}
}
if (state->frequency > 0)
/* Tilt correction ( 0.00016 dB/MHz ) */
gain -= ((((s32)(state->frequency / 1000) - 1550) * 2) / 12);
/* + (BBGain * 10); */
gain += (s32)((state->reg[0x01] & 0xC0) >> 6) * 600 - 1300;
if (gain < 0)
gain = 0;
else if (gain > 10000)
gain = 10000;
*st = 10000 - gain;
return 0;
}
static const struct dvb_tuner_ops tuner_ops = {
.info = {
.name = "ST STV6111",
.frequency_min_hz = 950 * MHz,
.frequency_max_hz = 2150 * MHz,
},
.set_params = set_params,
.release = release,
.get_rf_strength = get_rf_strength,
.set_bandwidth = set_bandwidth,
};
struct dvb_frontend *stv6111_attach(struct dvb_frontend *fe,
struct i2c_adapter *i2c, u8 adr)
{
struct stv *state;
int stat = -ENODEV;
int gatestat = 0;
state = kzalloc(sizeof(*state), GFP_KERNEL);
if (!state)
return NULL;
state->adr = adr;
state->i2c = i2c;
memcpy(&fe->ops.tuner_ops, &tuner_ops, sizeof(struct dvb_tuner_ops));
init_state(state);
if (fe->ops.i2c_gate_ctrl)
gatestat = fe->ops.i2c_gate_ctrl(fe, 1);
if (!gatestat)
stat = attach_init(state);
if (fe->ops.i2c_gate_ctrl && !gatestat)
fe->ops.i2c_gate_ctrl(fe, 0);
if (stat < 0) {
kfree(state);
return NULL;
}
fe->tuner_priv = state;
return fe;
}
EXPORT_SYMBOL_GPL(stv6111_attach);
MODULE_DESCRIPTION("ST STV6111 satellite tuner driver");
MODULE_AUTHOR("Ralph Metzler, Manfred Voelkel");
MODULE_LICENSE("GPL v2");
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